Was a result of an accidental diversion of the Colorado River for an eighteen-month period that filled in the low-lying basin which the sea now occupies

Prairie

Vegetation is dominated by tall native grasslands, short grasses, or scrub vegetation in North America

Counterurbanization

People leave large cities and move to smaller towns and rural areas

Megalopolis

East Coast of US, from Boston to Washington D.C.

Gentrification

Displacement of lower-income residents of central-city neighborhoods with higher income residents, rehabilitation of deteriorated inner-city landscapes, and construction of new shopping complexes, entertainment centers